Rotary oil burner



Nov. 24,1925. 1,562,874

H. L. DELANEY ROTARY OIL BURNER l Filed May 8, 1923 f 'rr Ns; q

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- /Verefl L A/a/fe am @mjfgmf/ Patented Nov. 24, 1925.

U NITE 'S TA T 'E HERBERT L. DELANEY, OF SAN FRANCISCO, CALIFORNIA,ASSIGNOR TO .HUNTING IRON WORKS, OF SAN FRANCISCO, CALIFORNIA, ACORPORATION OF CALIFORNIA.

ROTARY OIL BURNER.

Application filed May 8,

'To alt 'whom t 'may concern.'

Be it known that I, Hnnnnn'r L. DELANnY, a citizen of the United States,and a resident ot' the city and county ot San Francisco, in the State otCalifornia, have invented a new and useful Rotary Oil Burner, 'of whichthe following is a specification.

'llhis invention relates to an oil burner, and more particularly to sucha burner that sprays the liquid fuel by the aid of centrifugal force.This force may be produced by rotating a cup into which the liquid Jfuelis dripped. The sprayed fuel is in a proper .ondition for combustion forproducing heat. The heat may be used for generating steam and for otherwell-known purposes.

In such arrangements it is customary to provide for a fairly strongblast ot' air or other gas, such as steam, past the edges ot therotating cup so as to project the fuel spray into the combustionchamber, and also to supply at least a portion of the oxygen forsupporting the combustion. It has been proposed to create this blast byeither of two methods-either by a fan structure which is made a part ot'the burner, or else by conducting air or other gaseous fluid underpres-t sure through appropriate passageways past the cup. It is one ofthe objects of my invention to provide a. blast for an oil burner in anovel manner that is more economical than either of the schemesmentioned.

.another object of my invention is to im prove and simplify in generalan oil burner structure. f

In one type of oil burner the blast of air or other gaseous Huid isutilized to rotate the cup, by the aid of appropriately formed turbineblades. In this Way no separate sourcey of power need be provided foreffecting this rotation. My invention may be very readily utilized inconnection with a burner otthisv character, as well as with the usualtyp where the cup is motor driven. I

My invention possesses other advantaf` `geous features, some of whichwith the foregoing will be set forth at lenfrth in the followingdescription, where I slial-l outline in full that form Vof the inventionwhich I have 'selected for illustration in the drawings accompanying andforming part of the present specification. Although 1n the drawings Ihave shown but one embodiment of my invention, I do not desire to belimited thereto,

1923. serial No. 637,433.

since the invention as expressed in the claims may be embodied in otherforms also.

Referring to the drawings:

Figure 1 is a front elevational view et au oil burner embodying myinvention, as installed near the wall of a combustion chamber; p

Fig. 2 is a longitudinal sectional view otthe oil burner; y

Fig. 3 is/a sectional view along the plane 3--3 of Fig. 2; and A Fig. 4is a sectional vievv along plane 4-4 of Fig. 2.

A section of the combustion chamber wall 11 is indicated in Fig. 1 ofthe drawings, on which Wall may be appropriately supported the burnerstructure. In the present instance this structure is suppoi-ted onhollow hinge-pins 12 and 13 which also serve conveniently as conduitsfor the oil and air, 1n a manner that will be descrlbed in detailhereinafter. 'lhese pins 12 and 13 pass through i the cooperating lugs14 and 15, the lugs 141 being attached in any appropriate manner to thewall 11, and the lugs 15 tothe supporting member 16; .this member is soformed that the burner casing 17 of general dit tubular shape, may beprojected through the l opening 18 in the Wall 11 by swinging thesupport 1G on the hinge pins 12 and 13. Al though from this polnt on Ishall refer to the medium under pressure as air, it will be understoodthat my invention is not to be limited to the use of air only, since thesame benefits maybe derived by using other kinds of gases under pressure,l for example, such as steam. A

In the present .instance the oil cup 19 of conical form is fastened asby the interengaging threads 20to a rotatably mounted sleeve 21. Thissleeve has spiral shaped vanes or propellers 22 extendin from itsoutside surface, so that it may ie rotated gy a fluid current directedagainst the vanos.

he sleeve 21 is rotatably supported by the aid of the ball bearin s 23inter sed betweenthe interior of s eeve 21 an the staof the sleeve 29,and both these races and the sleeve are clamped tightly on rod 24between a shoulder 30 and the nuts 3l. Furthermore axial movement of therotatably mounted tube 2l may be prevented in any appropriate manner, asby the aid of the flange 32 formed at the end of the tube.

The rotatable structure just described may take other forms, since itsparticular details form no part of my present invention; and in fact itis possible to adapt my invention to a construction where the cup 19 isrotated not by an air blast but by an auxiliary motor.

The supply of oil to the interior of cup 19 is effected through the pipe33 which communicates with an aperture 34 in the member 27; thisaperture iu turn communicates with the axial bore 35 through the members25 and 24. Member 24 extends into the cup and carries at its end thedrip tube 36 which deposits the oil on the interior surface of cup 19.

That portion of the oil 'burner structure which appertains to thelsupplyof a gaseous fluid blast past the edge of cup 19 will now be described.For this purpose I use compressed air o1' other gaseous fluid underpressure, and discharge it at relatively high pressure into a conduitthat is open to the atmosphere. In this way the fluid due its velocityat discharge, serves to suck 1n a great deal of air into the conduitfrom the surrounding atmosphere, andthe resultant greatly increasedvolume of gaseous fluid at comparatively low pressure is conductedthrough appropriate passageways past the cup exterior. Although thismode of o eration may be accomplished by a wi e variety of apparatus, Irefer to utilize the devices illustrated, in w ich a pipe 37, connectedto a source of fluid under ressure, leads this fluid into an o en endetubular member 38. This mem er has a, flared mouth 39 where the gaseousfluid enters, which is bridged by a strap 40. This strap serves merelyas a support for the pipe 37, as by the aid of the boss 41 into whichthe pipe 37 is' screwed. Furthermore an vinjector nozzle 42 may ifdesired be utilized for ensuring a high velocity of dischar e of thefluid under pressure from pipe 3 with an attendant great suction effecton the air coming in throughI the mouth 39.

The member 38 is so designed that the proper expansion and attemantreduction in pressure take place therein for the fluid discharged frompipe 37. Furthermore the discharge end 43 of this member is connected tothe frame 17 near the structure for rotatably supporting the cup. Thefluid at relatively low pressure and of considerable volume is conductedpast the propellers 22, and is confined for this purpose by the aid *ofa tubular nozzle 44 of the desired configuration. y This nozzle may beconveniently supported on the easin 17, as by the aid of screw threads45. T e open end 46 of the nozzle serves to form a constricted narrowpassageway for the fluid past the end of cup 19, and the sprayed fuel isprojeeted by this fluid blast into the combustion chamber. At the sametime this blast also serves, by impinging against the pro- 'aellers 22,to rotate the cup. In order to guide the fluid blast into the annularspace formed between the nozzle 44 and the rotating sleeve 21, a conicaldeflector 47 is provided where the fluid leaves the member 38.

The piping for the oil pipe 33 and the pipe 37 from the hinge conduits12 and 13 is illustrated in Fig. 1. Th(` connections 48 and 49 are soarranged with respect to the conduit hinges 12 and 13 that rotation ofthe support 16 about these Ihinge pins is permitted.

The blast of gas, such as air or steam as produced in the wayoutlinedhas many advantages. It is possible to use air or steam at relativelyhigh pressure. By sucking in additional air through the open mouth 39 oftube 38, and by permitting the fluid to expand, the pressure is reducedto the desired value while its volume is correspondingly greatlyincreased. If compressed air or high pressure steam alone were usedwithout the aid of the additional air taken in at the mouth 39, acomparatively low pressure would have to be used in order to secure thebest results with the burner. It is uneconomical to provide such low airor steam pressure. On the other hand, the device desc'ribed may use highpressure air or steam in a very economical manner; the drawing in ofadditional air by permitting it to expand in the tube 38 makes theresultant blast have the right velocity and pressure. It has been foundby actual experiment thatsuch an arrangement as described may serve todraw in a. volume of air from the surrounding atmosphere that is severaltimes greater than that actually taken from the compressor. Thequantitative effects of the device may obviously be varied by prop erlyproportioning the elements thereim It 1s also understood that the oilsupplied through pipe 33 may be .pumped by any appropriate arrangementexternal of the apparatus shown. Likewise` an convenient form of aircompressor or ot er source of fluid pressure may be utilized to supplythe fluid through the pipe' 37.

I claim:

1. In an oil burner, a rotatable oil cup for spraying fuel suppliedthereto, and means for providing a blast of gaseous fluid to thecombustion chamber, comprisingr a hollow member forming an expansionchamber coaxial with said combustion Chmber,

said member' being open at one end, and means centrally positionedwithin said open end for conducting gaseous fluid under pressure intothe chamber near its open end, whereby the released fluid may serve todraw in air through the open end.

2. In. an oil burner, a rotatable oil eup for spraying fuel suppliedthereto, means adapted to be operated by a blast of' gaseous fluid forrotating the Cup, and means for producing a blast of' gas for rotatingthe cup and for projectingr the f'uel into a combustion chamber,comprising means forming an open ended chamber, means for releasinggaseous fluid under pressure near the open end ot the chamber in such aman ner as to draw in air through the open end, and a means forconducting the fluid past the cup rotating means and the end of' thecup.

ln an oil burner, a rotatable oil cup, a nozzle surrounding the cup andforming a discharge passage 'past theeup for a blast of gaseous fluid, amember of tubular form connected to the nozzle, said member having` anopening at its free end to the atmosphere coaxial with said passage, andmeans centrally positioned in said opening for conducting "a gaseousfluid under pressure into the member so as to draw in air through theopening. f

4c. ln au oil burner, a rotatable oil cup, a nozzle surrounding the cupand forming a discharge passage past the cup for a blast of gaseousfluid, a tubular member having flaring ends, one of said ends being opento the atmosphere, and the other connecting to the nozzle, and means forreleasing a gaseous fluid under pressure into the tubular member in astream substantially coaxial therewith.

5. ln an oil burner, a rotatable oil cup, a nozzle surrounding the cupand forming a discharge passage past the cup for a blast of gaseousfluid, means utilizing the blast for rotating the cup, a tubular memberhaving flaring ends, one of said ends being open to atmosphere and theother connected to the nozzle, and means for releasing a `substantiallycoaxial stream of fluid under pressure into said tubular member.

(i. In an oil burner, an oil cup, a rotatable sleeve supporting theycup, vanes on said sleeve whereby a blast of' gaseous fluid muy serve torotate the cup, a nozzle for couining the space around the vanes and fordireeting a blast beyond the end of the cup so as to project the fueltherefrom into a combustion chamber, a tubular member conneeted to thenozzle for providing a continuous passageway therewith, said tubularmember. having a flared end adjacent the nozzle, a deflector fordirecting the fluid blast into the annular space between the nozzle andthe rotatable sleeve, said tubular member 4leaving a free flaring endopen to the atmosphere, a strap across this end, and means for releasinga stream of gaseous fluid under pressure into the tubularmember, saidmeans being supported on the strap.

n testimony whereof, I have hereunto set my hand.

HERBERT L. DELANEY.

